// timer helpers
//-------------------------------------------------
// timer_list_insert - insert a new timer into
// the list at the appropriate location
//-------------------------------------------------
public emu_timer timer_list_insert(emu_timer timer)
{
// disabled timers sort to the end
attotime expire = timer.enabled() ? timer.expire() : attotime.never;
// loop over the timer list
emu_timer prevtimer = null;
for (emu_timer curtimer = m_timer_list; curtimer != null; prevtimer = curtimer, curtimer = curtimer.next())
{
// if the current list entry expires after us, we should be inserted before it
if (curtimer.expire() > expire)
{
// link the new guy in before the current list entry
timer.m_prev = prevtimer;
timer.m_next = curtimer;
if (prevtimer != null)
{
prevtimer.m_next = timer;
}
else
{
m_timer_list = timer;
}
curtimer.m_prev = timer;
return(timer);
}
}
// need to insert after the last one
if (prevtimer != null)
{
prevtimer.m_next = timer;
}
else
{
m_timer_list = timer;
}
timer.m_prev = prevtimer;
timer.m_next = null;
return(timer);
}
//-------------------------------------------------
// execute_timers - execute timers that are due
//-------------------------------------------------
void execute_timers()
{
if (machine().video().frame_update_count() % 400 == 0)
{
LOG("execute_timers: new={0} head->expire={1}\n", m_basetime.as_string(), m_timer_list.expire().as_string());
}
// now process any timers that are overdue
while (m_timer_list.expire() <= m_basetime)
{
// if this is a one-shot timer, disable it now
emu_timer timer = m_timer_list;
bool was_enabled = timer.enabled();
if (timer.m_period.is_zero() || timer.m_period.is_never())
{
timer.m_enabled = false;
}
// set the global state of which callback we're in
m_callback_timer_modified = false;
m_callback_timer = timer;
m_callback_timer_expire_time = timer.expire();
// call the callback
if (was_enabled)
{
g_profiler.start(profile_type.PROFILER_TIMER_CALLBACK);
if (timer.m_callback != null)
{
if (timer.m_device != null)
{
LOG("execute_timers: expired: {0} timer device {1} timer {2}\n", timer.expire().attoseconds(), timer.m_device.tag(), timer.m_id);
}
else
{
LOG("execute_timers: expired: {0} timer callback {1}\n", timer.expire().attoseconds(), timer.m_callback.ToString());
}
timer.m_callback(timer.m_ptr, timer.m_param);
}
g_profiler.stop();
}
// reset or remove the timer, but only if it wasn't modified during the callback
if (!m_callback_timer_modified)
{
// if the timer is temporary, remove it now
if (timer.m_temporary)
{
m_timer_allocator.reclaim(timer.release());
}
// otherwise, reschedule it
else
{
timer.schedule_next_period();
}
}
}
// clear the callback timer global
m_callback_timer = null;
}